Roads of the Mid-South & West > Highways of the State of Maryland > Maryland State Route 4
 | Maryland State Route 4
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Maryland State Route 4 is an east-west highway in Southern Maryland. It runs from the Maryland/Washington D.C. Line to near Leonardtown. Info on MD St Rt 4 is broken down by county below.
Calvert County St Mary's County
16 December 2012